<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

    <!-- 
        get post 区别

     -->

    <form action="" method="post">
        <input type="text" name="username">
        <input type="password" name="userpwd">
        <button type="submit">提交</button>
    </form>


    <script>

        // get post  区别

        // search  ?后面的一串

    </script>

</body>

</html>